From ff258f1bc1ba8dc58a7c061c310d2c6100817a91 Mon Sep 17 00:00:00 2001
From: Nikias Bassen
Date: Fri, 21 Apr 2023 16:38:08 +0200
Subject: autoconf: Automatically derive version number from latest git tag

---
 configure.ac    |  9 +++++++--
 git-version-gen | 19 +++++++++++++++++++
 2 files changed, 26 insertions(+), 2 deletions(-)
 create mode 100755 git-version-gen

diff --git a/configure.ac b/configure.ac
index 58d6585..ca69d32 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,8 +1,8 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-AC_PREREQ(2.68)
-AC_INIT([libimobiledevice-glue], [1.0.0], [https://github.com/libimobiledevice/libimobiledevice-glue/issues],, [https://libimobiledevice.org])
+AC_PREREQ([2.68])
+AC_INIT([libimobiledevice-glue], [m4_esyscmd(./git-version-gen $RELEASE_VERSION)], [https://github.com/libimobiledevice/libimobiledevice-glue/issues], [], [https://libimobiledevice.org])
 AM_INIT_AUTOMAKE([dist-bzip2 no-dist-gzip check-news])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES])
 AC_CONFIG_SRCDIR([src/])
@@ -17,6 +17,11 @@ dnl libtool versioning
 # CURRENT : REVISION : AGE
 LIBIMOBILEDEVICE_GLUE_SO_VERSION=0:0:0
 
+# Check if we have a version defined
+if test -z $PACKAGE_VERSION; then
+  AC_MSG_ERROR([PACKAGE_VERSION is not defined. Make sure to configure a source tree checked out from git or that .tarball-version is present.])
+fi
+
 dnl Minimum package versions
 LIBPLIST_VERSION=2.3.0
 
diff --git a/git-version-gen b/git-version-gen
new file mode 100755
index 0000000..f6cb31c
--- /dev/null
+++ b/git-version-gen
@@ -0,0 +1,19 @@
+#!/bin/sh
+SRCDIR=`dirname $0`
+if test -n "$1"; then
+  VER=$1
+else
+  if test -r "${SRCDIR}/.git" && test -x "`which git`" ; then
+    git update-index -q --refresh
+    if ! VER=`git describe --tags --dirty 2>/dev/null`; then
+      COMMIT=`git rev-parse --short HEAD`
+      DIRTY=`git diff --quiet HEAD || echo "-dirty"`
+      VER=`sed -n '1,/RE/s/Version \(.*\)/\1/p' ${SRCDIR}/NEWS`-git-${COMMIT}${DIRTY}
+    fi
+  else
+    if test -f "${SRCDIR}/.tarball-version"; then
+      VER=`cat "${SRCDIR}/.tarball-version"`
+    fi
+  fi
+fi
+printf %s "$VER"
-- 
cgit v1.1-32-gdbae